The artillery of the Commonwealth in the middle of the 17th century was poorly developed. But Kazimir Semenovich believed that the future of military art was in artillery. However, campaigns and battles changed his ideas not only about artillery. After many years of study, Semenovich returned to his homeland to complete and present a book here that would change military affairs forever. What unique developments did the designer offer? How did a 17th century engineer come up with the idea for which NASA named him one of the founders of astronautics?